Sarah Michelle Gellar was 4 in An Invasion of Privacy when she played the character 'Jennifer Bianchi'.
That was over 41 years ago in 1983.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 47, and has starred in 33 movies in total, 30 of those since An Invasion of Privacy was released.
In An Invasion of Privacy, I think Sarah Michelle Gellar looks: